An effective emergency response plan outlines the steps to be taken in the event of an incident involving hazardous substances. This may include procedures for evacuating the area, containing spills, providing first aid, and notifying emergency services. A well-defined plan ensures a coordinated and efficient response, minimizing the impact of the incident on workers' health and safety. Regular drills and training sessions help to ensure that employees are familiar with the plan and can respond effectively in an emergency.